Q6: i) Which of the following is true for a transmission line under load? Power factor at both the sending and receiving end will be equal Reactive Power at both the sending and receiving end will be equal. Active Power at the sending end will be greater than the active power at the receiving end. Line current in the sending end will be equal to the line current at the receiving end ii) A transmission line has 80% efficiency when delivering 500 KW power to a 3-phase load at the receiving end. This implies that ______. Voltage regulation of the line is 20% Active power at the receiving side 375 kw/phase Active power at the sending end is 500 kw/phase Total power loss in the transmission line is 125 kW iii) Which of the following is true for transmission line under no-load? Power factor at the sending end will be unity Active Power at the receiving end will be zero. Line current at the sending end will be zero. Reactive Power at the sending end will be zero.
Load flow analysis
Load flow analysis is a study or numerical calculation of the power flow of power in steady-state conditions in any electrical system. It is used to determine the flow of power (real and reactive), voltage, or current in a system under any load conditions.
Nodal Matrix
The nodal matrix or simply known as admittance matrix, generally in engineering term it is called Y Matrix or Y bus, since it involve matrices so it is also referred as a n into n order matrix that represents a power system with n number of buses. It shows the buses' nodal admittance in a power system. The Y matrix is rather sparse in actual systems with thousands of buses. In the power system the transmission cables connect each bus to only a few other buses. Also the important data that one needs for have a power flow study is the Y Matrix.
Types of Buses
A bus is a type of system of communication that transfers data between the components inside a computer or between two or more computers. With multiple hardware connections, the earlier buses were parallel electrical wires but the term "bus" is now used for any type of physical arrangement which provides the same type of logical functions similar to the parallel electrical bus. Both parallel and bit connections are used by modern buses. They can be wired either electrical parallel or daisy chain topology or are connected by hubs which are switched same as in the case of Universal Serial Bus or USB.
Q6:
i)
Which of the following is true for a transmission line under load?
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Power factor at both the sending and receiving end will be equal
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Reactive Power at both the sending and receiving end will be equal.
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Active Power at the sending end will be greater than the active power at the receiving end.
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Line current in the sending end will be equal to the line current at the receiving end |
ii)
A transmission line has 80% efficiency when delivering 500 KW power to a 3-phase load at the receiving end. This implies that ______.
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Voltage regulation of the line is 20% |
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Active power at the receiving side 375 kw/phase
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Active power at the sending end is 500 kw/phase
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Total power loss in the transmission line is 125 kW
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iii)
Which of the following is true for transmission line under no-load?
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Power factor at the sending end will be unity
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Active Power at the receiving end will be zero.
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Line current at the sending end will be zero. |
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Reactive Power at the sending end will be zero.
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